:root {
    --color-charcoal-950: #0a0b0d;
    --color-charcoal-900: #121316;
    --color-charcoal-800: #1c1d21;
    --color-charcoal-700: #2a2b30;
    --color-charcoal-600: #3d3f46;
    --color-charcoal-500: #52545c;
    --color-charcoal-400: #737580;
    --color-charcoal-300: #9b9da5;
    --color-charcoal-200: #c4c5ca;
    --color-charcoal-100: #e2e3e5;
    --color-charcoal-50: #f6f6f7;
    --color-coral-500: #ff6b4a;
    --color-coral-600: #f04e28;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    overflow-x: hidden;
}

/* Scroll reveal base — content is visible by default */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
}

/* Hero animations */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Navbar scroll state */
nav.scrolled {
    background: rgba(10, 11, 13, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(42, 43, 48, 0.5);
}

/* Service card hover */
.service-card {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s ease, background 0.4s ease;
}

.service-card:hover {
    transform: translateY(-4px);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--color-charcoal-950);
}
::-webkit-scrollbar-thumb {
    background: var(--color-charcoal-700);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-charcoal-600);
}

/* Selection */
::selection {
    background: rgba(255, 107, 74, 0.3);
    color: #f6f6f7;
}

/* Mobile menu transition */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    opacity: 0;
}

#mobile-menu.open {
    max-height: 400px;
    opacity: 1;
}

/* Button focus styles */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid #ff6b4a;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Smooth image loading */
img {
    opacity: 1;
    transition: opacity 0.3s ease;
}